National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Fair

80°F

27°C

Humidity 51%
Wind Speed E 5 mph
Barometer 29.89 in (1011.3 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 2 Aug 10:56 pm CDT
Extended Forecast for

Lockhart TX

  • Tonight

    Tonight: Mostly clear, with a low around 73. Calm wind.

    Low: 73 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 102. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 102 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 75. South southeast wind 5 to 10 mph.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 106. South wind 5 to 10 mph.

    High: 99 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 76. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 99. South wind around 5 mph.

    High: 99 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 98. South wind around 5 mph.

    High: 98 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 76. South wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 73. Calm wind.
Monday
Sunny and hot, with a high near 102. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
Mostly clear, with a low around 75. South southeast wind 5 to 10 mph.
Tuesday
Partly sunny, then gradually becoming sunny and hot, with a high near 99. Heat index values as high as 106. South wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 76. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Sunny and hot, with a high near 99. South wind around 5 mph.
Wednesday Night
Mostly clear, with a low around 76. South southeast wind 5 to 15 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 98. South wind around 5 mph.
Thursday Night
Mostly clear, with a low around 76. South wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a high near 98.
Friday Night
Mostly clear, with a low around 76.
Saturday
Mostly sunny, with a high near 97.
Saturday Night
Mostly clear, with a low around 76.
Sunday
Mostly sunny, with a high near 97.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lockhart TX
 29.88°N 97.68°W (Elev. 525 ft)
Last Update:
6:42 pm CDT Aug 2, 2026
Forecast Valid:
11pm CDT Aug 2, 2026-6pm CDT Aug 9, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation